Пакет zuo: Информация

Zuo: A Tiny Racket for Scripting

You should use Racket to write scripts. But what if you need something
much smaller than Racket for some reason - or what if you're trying to
script a build of Racket itself? Zuo is a tiny Racket with primitives
for dealing with files and running processes, and it comes with a
make-like embedded DSL.

Zuo is a Racket variant in the sense that program files start with
\#lang, and the module path after #lang determines the parsing and
expansion of the file content. That's how the make-like DSL is defined,
and even the base Zuo language is defined by layers of #langs. One of
the early layers implements macros.